Truck-brake.



E. D. HARDING. TRUCK BRAKE. APPLICATION FILED JUNE 26, 1909.

457172012 0, Hardin W BY Q 6 W @m ATTOR/VE rs Patented June 14, I910.

ELMON D. HARDING, OF MONTEVIDEO, MINNESOTA.

TRUCK-BRAKE.

Specification of Letters Patent.

Patented June 14, 1910.

Application filed June 26, 1909. Serial No. 504,498.

To all whom it may concern:

Be it known that I, ELMON D. HARDING, a citizen of the United States,and a resident of Montevideo, in the county of Chippewa and Stateof'Minnesota, have invented a new and Improved Truck-Brake, of which thefollowing is a full, clear, and exact description.

My invention relates to truck brakes, and more especially to brakes ontrucks used at railway stations, and it has for its object to providemeans which will automatically operate the brake when the platform manhangs up the tongue of the truck.

Still other objects of the invention will appear in the followingcomplete description.

In this specification I will describe the preferred form of myinvention, it being understood that the scope of the invention isdefined in the appended claims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of a truck having my invention appliedthereto, parts being in section on the line 1-1 of Fig. 2; Fig. 2 is afront elevation of the truck, partly in section on the line 2-2 of Fig.1; and Fig. 3 is a front elevation of the truck showing the tongueresting on the ground.

By referring to the drawings, it will be seen that the truck is of theusual form, and that it is provided with a guide 5, in which is disposeda bolt 6, the bolt being adapted to engage a sprocket wheel 7 secured toone of the wheels 8 of the truck. The preferred manner of securing thesprocket wheel 7 to the wheel 8 is to provide looped rods 7 'f, theloops of which are disposed around the spokes of the wheel 8, the rodspassing through orifices in the sprocket wheels 7 and being held inplace by nuts 7 which mesh with threads on the rods. A chain 9 issecured to the bolt 6, and passes over a pulley 10, and also overpulleys 11 to the front 12 of the truck.

At the front of the truck there is a pulley 13, the axis of which isvertical, the chain 9 passing around the pulley 13, and being secured toa hook 14 on one arm 15 of a bentlever, the other arm 16 of the leverbeing weighted. A pin 17 is secured to the front of the truck at oneside of the arm 16 of the purpose being to limit the movethe lever asbest shown in F1 3.

7 b lever 18 immedilever, its ment of The fulcrum a of the bent atelyabove the tongue 18, which is pivoted to the truck in the customarymanner. This tongue 18 is provided with a staple 19 with which the hook14L is adapted to engage.

The trucks used on station platforms are equipped with hooks to hold uptheir tongues, and railroad employees are instructed to have the tonguessupported by the said hooks at all times when the trucks are not in use,the purpose of this requirement being to prevent passengers from fallingover the tongues, and also to prevent the tongues from becoming damaged.

In using my invention, when the employee hangs the tongue up by means ofthe engagement of the hook 1 1 with the staple 19, the lever 15 is heldstationary with the weighted arm 16 upwardly disposed, and in thisposition the chain 9 is long enough so that it does not draw the bolt 6away from the sprocket wheel 7. However, when the hook 1 1 is freed fromthe staple 19 of the tongue 18, the weighted arm 16 will descend and thehook 14: will ascend toward the right, which will draw on the chain 9,by which means the bolt 6 will be drawn upwardly away from the sprocketwheel 7, thereby disengaging the brake mechanism. If at any time itshould be desired to free the tongue 18 and at the same time retain thebrake mechanism in operative position, the weighted arm 16 of the lever15 is moved to the right so that it rests against the pin 17, as bestshown in Fig. 3 of the drawings. In this position the hook 1 1 does notdraw on the chain 9, and there is therefore no move ment of the bolt 6.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In combination with a truck, a wheel mounted to rotate, a sprocketwheel secured thereto, a bolt disposed to engage the teeth in thesprocket wheel, a pulley, a flexible means to which the bolt is secured,the flexible means being disposed over the pulley, a pivoted tongue, anda lever disposed over the tongue, one arm of the lever being in the formof a hook adapted to engage the tongue, the other arm of the lever beingweighted, the flexible means being secured to the lever.

2. In combination with a truck, a wheel mounted to rotate, a membersecured to the wheel having a recess, a guide, a bolt disposed in theguide adapted to be introduced into the recess, a pulley, a flexiblemeans, one end of which is secured to the bolt and is disposed over thepulley, a pivoted hook having a weighted arm to which the other end ofthe flexible means is secured, and a pivoted tongue, the hook beingadapted to engage the tongue.

3. In combination with a truck, a wheel mounted to rotate, means toprevent the rotation of the wheel, a pivoted tongue, a lever having onearm formed in the shape of a hook, which is adapted to engage the tongueto support it, and a flexible means, one end of which is connected tothe said means to operate them, the other end of the flexible meansbeing secured to the lever.

4. In combination with a truck, a Wheel mounted to rotate, means toprevent the rotation of the wheel, a pivoted tongue, a lever pivotedover the tongue having one arm in the shape of a hook, means to hold thearm yieldingly upward, means to limit the movement of the lever, and aflexible means, one end of which is connected to the first-mentionedmeans to operate it, the other end of the flexible means being securedto the lever.

5. In combination With a truck, a Wheel,

means to prevent the rotation of the Wheel, a pivoted tongue, a levermounted thereover, one arm of the lever being in the form of a hookadapted to engage an eye in the tongue, the other arm being weighted, apin at one side of the fulcrum of the lever adapted to limit itsmovement, and flexible means connected at one end with the said means tooperate them, the other end of the flexible means being secured to thehook of the lever.

6. In combination with a truck, a Wheel mounted to rotate, a sprocketwheel secured thereto, a guide, a bolt disposed in the guide adapted toengage the sprocket wheel, a

pulley disposed over the guide, a flexible means secured at one end tothe bolt and disposed over the pulley, a pivoted tongue, and a levermounted thereover, one arm of the lever being in the form of a hookadapted to engage an eye in the tongue, the other arm of the lever beingweighted, and the other end of the flexible means being secured to thehook of the lever.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

ELMON D. HARDING. WVitnesses:

C. D. BENSEL, CHARLES WALDEOK.

